Danfoss H1 045,053,060,068 Pump Service Manual 50940483 – PDF DOWNLOAD

Danfoss H1 045,053,060,068 Pump Service Manual 50940483 – PDF DOWNLOAD

FILE DETAILS:

Danfoss H1 045,053,060,068 Pump Service Manual 50940483 – PDF DOWNLOAD

Language : English
Pages : 64
Downloadable : Yes
File Type : PDF
Size: 5.21 MB

IMAGES PREVIEW OF THE MANUAL:

DESCRIPTION:

Danfoss H1 045,053,060,068 Pump Service Manual 50940483 – PDF DOWNLOAD

Overview:
This manual includes information on installation, maintenance, and minor repair of these pumps. It
includes a description of the unit and its individual components, troubleshooting information, and minor
repair procedures.
Performing minor repairs may require the unit to be removed from the vehicle/machine. Thoroughly
clean the unit before beginning maintenance or repair activities. Since dirt and contamination are the
greatest enemies of any type of hydraulic equipment, follow cleanliness requirements strictly. This is
especially important when changing the system filter and when removing hoses or plumbing.

TABLE OF CONTENTS:

Danfoss H1 045,053,060,068 Pump Service Manual 50940483 - PDF DOWNLOAD

Introduction
Overview 5
Warranty 5
General instructions 5
Remove the unit 5
Replace all O-rings and gaskets 5
Safety Precautions 6
Unintended machine movement 6
Flammable cleaning solvents 6
Fluid under pressure 6
Personal safety 6
Symbols used in Danfoss literature 7
Design 7
The System Circuit 8
The basic closed circuit 8
Case drain and heat exchanger 8
The System Schematic 9
Operation
Pressure Limiter Valves (060/068 only) 10
High Pressure Relief Valve (HPRV) and Charge Check 10
Bypass Function 11
Charge Pressure Relief Valve 11
Electrical Displacement Control (EDC) 12
EDC Principle 12
EDC Operation 13
Manual OverRide (MOR) 13
Manual Displacement Control (MDC) 14
MDC Torque 15
MDC General Information 15
General information - CCO 16
Neutral Start Switch (NSS) 16
Case Gauge Port M14 16
Operating Parameters
Overview 17
Input Speed 17
System Pressure 17
Charge Pressure 17
Charge Inlet Pressure 18
Case Pressure 18
Temperature and Viscosity 18
Temperature 18
Viscosity 18
Specifications
Technical Specifications 19
Fluid and Filter Maintenance
Filtration System 22
Pressure Measurements
Port Locations and Gauge Installation 23
Initial Startup Procedure
General 25
Start-up Procedure 25
Troubleshooting
Overview 26
Safety Precautions 26
Electrical Troubleshooting 26
Service Manual
H1 045/053/060/068 Closed Circuit Axial Piston Pumps
Contents
© Danfoss | April 2018 520L0958 | AX00000104en-000303 | 3
System Operating Hot 27
Transmission Operates Normally in One Direction Only 27
System Does Not Operate in Either Direction 27
System Noise or Vibration 28
Neutral Difficult or Impossible to Find 28
Sluggish System Response 29
Adjustments
Pump Adjustment 30
Standard Procedures 30
Charge Pressure Relief Valve Adjustment 30
Pressure Limiter Adjustment 31
Engaging the Bypass Function 33
Displacement Limiter Adjustment 34
Control Neutral Adjustment 35
Mechanical Neutral Adjustment 37
Servo adjustment 37
Verify neutral setting 38
Servo Adjustment Side M4 38
Minor Repair
Standard Procedures, Removing the Pump 39
Control Module 39
Replace Control Solenoids/Actuator Housings 40
MDC Control 41
Removal 41
MDC illustration - single pumps 42
MDC Legend - single pumps 43
Inspection 43
Reassembly 43
Angle sensor on EDC 44
Removal 44
Installation 45
EDC with angle sensor 45
Removal 45
Installation 46
Automotive Control 47
Removal 47
Inspection 49
Assembly 49
Shaft Seal, Roller Bearing and Shaft Replacement 50
Charge Pump 51
Charge Check / HPRV 54
Charge Pressure Relief Valve 55
Pressure Limiter Valve Replacement 56
Torque Chart
Fastener Size and Torque Chart 58
Plug Size and Torque Chart 58
Fasteners and Plugs 59